Mapping of ground motion amplifications for the Fraser River delta in Greater Vancouver, Canada

论文摘要

The Fraser River delta in Greater Vancouver, Canada consists of deep soft deposits of silts and clays, and it is well known that the deep soil deposits can amplify the low frequency contents of ground motions. This study aims to investigate the effects of deep soil deposits in the delta on ground motion amplifications by using thorough site response simulations that account for the full soil profiles and a suite of recorded ground motions that covers a wide range of intensity levels. Based on both equivalent-linear and nonlinear site response simulations, the effects of soil depth（represented by natural period of the soil, TS） on ground motion amplifications for various spectral periods are clearly demonstrated. The ground motion amplification maps for various spectral periods and rock ground motion intensity levels are also generated to be used in the regional seismic hazard assessment for infrastructure. It is found that ground motions for long periods are substantially amplified in the center of the delta, while those for short periods are de-amplified when input rock motions are large.

论文目录

• 1 Introduction
• 2 1D site response analysis
•   2.1 Shear-wave velocity profiles
•   2.2 Soil types and Nonlinear soil properties
•   2.3 Input motions
•   2.4 Site response analysis methodology
• 3 Site response analysis results
•   3.1 Comparison with the NGA-West 2 Models
•   3.2 Effects of site period
• 4 Ground motion amplification map
• 5 Conclusions
• Appendix

文章来源

类型: 期刊论文

作者: Byungmin Kim

来源: Earthquake Engineering and Engineering Vibration 2019年04期

年度: 2019

分类: 基础科学

专业: 地质学,地球物理学

单位: Ulsan National Institute of Science and Technology

基金: 2018 Research Fund(1.170059.01)of UNIST(Ulsan National Institute of Science and Technology),the National Research Foundation of Korea(NRF)with a grant from the Korean government(MSIT)(NRF-2017R1C1B5074430)

分类号: P315

页码: 703-717

总页数: 15

文件大小: 2414K

下载量: 19